Thread Number: 35162
Belt drive spray rinses: how are they timed? |
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Post# 525985 , Reply# 2   6/21/2011 at 07:05 (4,664 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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These machines timers have a small separate cam in the timer that is faster moving that operates the spray rinses when called for by one of the primary cam switches. WP did this because WP BD machines filled at a much faster rate than MT and a 30 second or longer spray rinse would overwhelm the pump out ability of the pump while trying to spin. Its also a little more effective to let the spray rinse water spin completely through the clothing before adding more. These timers with the separate cam are a little more complcated and expensive to make, but I would guess that the engineers at WP wanted to do it this way. |
Post# 526005 , Reply# 3   6/21/2011 at 09:34 (4,664 days old) by kenmoreguy64 (Charlotte, NC)   |   | |
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To expand a little bit on what John said, the spray rinse segment of the cycle on newer models is always the first timer increment of the spin phase. In BDs made the last ten years or so, this is the only spin increment between wash and rinse, and the first of three increments in the final spin of the Normal cycle.
I have heard here on the site many times that the spray rinses last for 7 seconds, though I have one machine which seems to spray for closer to 5 seconds. It does however seem that this varies ever slightly by the individual timer itself. I generally gauge a machine's basket drive health in how fast the machine accelerates and if the spray rinses begin well after the machine has reached full-speed spin and 'settled' in before the sprays begin. G This post was last edited 06/21/2011 at 09:56 |
Post# 526012 , Reply# 4   6/21/2011 at 09:44 (4,664 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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Post# 526017 , Reply# 5   6/21/2011 at 09:55 (4,664 days old) by Tomturbomatic (Beltsville, MD)   |   | |
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John, you said that the self cleaning filter did not flush the lint from the filter until the suds valve closed so that the lint would go down the drain instead of into the saved wash water. Was there enough water in the brief sprays to flush the filter? |
Post# 526021 , Reply# 6   6/21/2011 at 10:20 (4,664 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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By the time the self-cleaning filters were around the suds valve was denergized as soon as the machine started to spin and from may experience there was enough water being discharged to flush out the filter completely. Wouldn't it be fun to get one of the clear plastic filters that they used to have hooked up to machine at the Sears stores to demonstrate this nifty feature. |
Post# 526051 , Reply# 7   6/21/2011 at 14:19 (4,663 days old) by DADoES (TX, U.S. of A.)   |   | |
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Post# 526056 , Reply# 8   6/21/2011 at 14:29 (4,663 days old) by kenmoreguy64 (Charlotte, NC)   |   | |
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Malcolm -
I'll be careful in speaking too generally as there may have been some variations in the early days in BD machines that I've never experienced, BUT, I am only aware of timers with 60-second and 120-second increments, and the vast majority of those are the 120-second design, especially in later models. I think the 60-second timer models were for BOL machines only with very limited cycles. The most complicated of timers (typically those used in multi-cycle Lady Kenmores and the like) would be the candidates for higher second increments, but none of the Ladies from 1970 to the end of the belt-drives had greater than 120-second set-ups, not that I've ever heard of anyway. Some of these timers are very complex as compared to mid-line models, with two sets of switchbanks instead of one, many cam 'channels' and a lot going on in each cycle as there needs to be cams and switches to turn on an off detergent valves, to energize various solenoids, and etc. I have always thought that the Enzyme Soak cycles, which in the early 1970s were 30 minutes in duration, were shortened to 22 minutes by the mid 70s in part to gain back four 'clicks' on the timer, which must have been needed elsewhere. The off positions on these timers were usually one only or two clicks wide (with the exception of non-suds timers that were OFF in what would otherwise be a suds return spot). The two Kenmores we had with Soak cycles don't have four clicks to spare anywhere on the dial. Gordon |
Post# 526080 , Reply# 9   6/21/2011 at 16:21 (4,663 days old) by aldspinboy (Philadelphia, Pa)   |   | |
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Post# 526156 , Reply# 10   6/22/2011 at 00:10 (4,663 days old) by alr2903 (TN)   |   | |
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Thanks guy's I had no idea that the KM's filled faster than the MT's , but it sure makes perfect sense now. thanks alr2903
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